Two Independent methods of forecasting based on Judgment and experlence have been prepared each month for the past 10 months. The forecasts and actual sales are as follows: a. Compute the MSE and MAD for each forecast. Note: Round your answers to 2 decimal places. b. Compute MAPE for each forecast. Note: Round your intermediate calculations to 5 decimal places and final answers to 4 decimal places. c. Prepare a nalve forecast for perlods 2 through 11 using the given sales data. Compute each of the following: MSE, MAD. Tracking signal at month 10 , and 2s control limits. Note: Negative values should be indicated by a minus sign. Round your answers to 2 decimal places.